body {
    font: 20px "Hiragino Sans GB", sans-serif;
    background: #eee;
}

ul li {
    list-style: none;
}

#container {
    width: 900px;
    margin: 10px auto;
    position: relative;
    background: url(https://a248.e.akamai.net/assets.github.com/images/spinners/octocat-spinner-32.gif) no-repeat 45% 25%;
}

#balls {
    padding: 0;
    margin: 0;
    list-style: none;
    height: 500px;
}

#balls li,
#lucky-balls li {
    position: absolute;
    left: 420px;
    top: 470px;
    padding: 0;
    width: 60px;
    height: 60px;
    overflow: hidden;
    font-size: 16px;
    background: #333;
    color: #ddd;
    opacity: .5;
    text-align: center;
    line-height: 60px;
    border-radius: 30px;
    word-break: keep-all;
    cursor: pointer;
}

#go {
    width: 200px;
    height: 50px;
    display: block;
    margin: 0 auto;
    font-size: 22px;
    border: none;
    background: none;
    color: #999;
}

#balls li.selected {
    color: #fff;
    background: #f60;
    font-size: 50px;
    height: 200px;
    width: 200px;
    line-height: 200px;
    border-radius: 100px;
    -webkit-transition: 0.3s ease-in;
    -webkit-transition-property: width, height, font;
    z-index: 100;
}

#lucky-balls {
    padding: 20px;
    margin: 10px 0;
    list-style: none;
}

#lucky-balls li {
    position: relative;
    left: auto !important;
    top: auto !important;
    width: 60px !important;
    height: 60px !important;
    float: left;
    margin: 5px 10px;
    font-weight: bold;
    color: #fff;
    background: #f60;
}
